Abstract
Abstract Rare earth(III) complexes of a Schiff base (H2L) derived from benzoylacetone and sulfamethoxypyridazine have been synthesized and characterized by elemental analyses, conductance measurements, solubilities, thermal analyses, and IR, 1HNMR and electronic spectral data. Elemental analyses reveal the presence of 2:3 (metal: ligand) stoichiometry and molar conductivities in DMF show the non-electrolytic nature of all the complexes. IR and 1HNMR spec-tral studies indicate that the Schiff base acts as a dibasic qua-dridentate ligand in the ketoenamine form coordinating to the rare earth(III) through the enamine N, carbonyl 0, sulfonyl 0 and pyridazinyl N atoms. The electronic spectra measured in the solid state exhibit onyl slight shifts in the visible region. The cova-lent parameters of β, δ and b½ have been calculated based on those spectra.
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